<!DOCTYPE html>
<html>
<head>
<style type="text/css">
html {
	height: 280px;
	width: 400px;
}

body {
	font: 12px Arial;
	height: 100%;
	display: -webkit-box;
	-webkit-box-orient: top;
	-webkit-box-pack: left;
}
</style>
</head>
<body>
	<div id="group">
		<form action="">
			<input
				type="checkbox"
				id="state"
			>Filter on
		</form>
		<hr />
		<button
			id="colorHidden"
			hidden="hidden"
			style="float: right; clear: both;"
		>Show filtered</button>
		<h2>Filtered:</h2>
		<div id="popup"></div>
	</div>
	<script
		src="popup.js"
		type="text/javascript"
	></script>
</body>
</html>